You can configure your own (with custom size and position of the slits) on my models repository.

Context

My landlord hired by painter to paint the ceiling of my flat. They did not remove ceiling lamps, so when we wanted to install a new lamp, but we could see where the paint was not done.

So I designed this rosette to hide the bad paint job. Also, this allows me to have more cable hidden (and therefore not cut it too short).

I also added two screw slits to fix the rosette to the ceiling. I configured it to fit with the holes from the previous lamp.

I printed the rosette in white PLA, with tree supports. The supports were easy to remove, and the rosette looks great.